I'm on the lookout for one of these, I almost got one when they first came out in the 90's, but I couldn't justify it at the time, buying online (where I live there are not really any local gun shops, I have to beg a lift from my neighbour for a 40 mile round trip to a decent gun shop) how do I know that I am getting a decent one (earlier = decent), I've looked and they can range in price quite significantly, any pointers greatly received.